Hemofiltration systems and methods that maintain sterile extracorporeal processing conditions
First Claim
1. A disposable fluid circuit for use in extracorporeal blood treatment systems that supply replacement fluid to a patient, comprising:
- a fluid circuit having a blood portion for carrying blood, a filtrate portion connectable across a porous membrane to said blood portion, anda replacement fluid portion connectable to a supply of replacement fluid;
a sterilizing filter in said replacement fluid portion,said sterilizing filter having a pore size effective to eliminate pyrogens from a fluid passing therethrough;
said replacement fluid portion having a plurality of connectors joined at a junction to flow through said sterilizing filter into a common inlet to the replacement fluid portion;
each of the plurality of connectors being connected to a respective one of multiple replacement fluid containers whose total content equals at least 8 liters of replacement fluid, each of the replacement fluid containers containing the same replacement fluid.
10 Assignments
0 Petitions
Accused Products
Abstract
A disposable fluid circuit kit for extracorporeal blood treatment systems that supply replacement fluid to a patient is described. The circuit has a blood portion that carries blood and subjects it to some treatment, such as dialysis or hemofiltration. A portion carries filtrate or dialysate. A replacement fluid portion that carries fluid used to compensate for fluid loss is connectable to a supply of replacement fluid. a sterilizing filter in the replacement fluid portion sterilizes the replacement fluid before introduction into the patient acting as a guard against touch contamination of the connected replacement fluid container. Preferably, the filter has a pore size effective to eliminate pyrogens.
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Citations
24 Claims
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1. A disposable fluid circuit for use in extracorporeal blood treatment systems that supply replacement fluid to a patient, comprising:
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a fluid circuit having a blood portion for carrying blood, a filtrate portion connectable across a porous membrane to said blood portion, and a replacement fluid portion connectable to a supply of replacement fluid;
a sterilizing filter in said replacement fluid portion,said sterilizing filter having a pore size effective to eliminate pyrogens from a fluid passing therethrough; said replacement fluid portion having a plurality of connectors joined at a junction to flow through said sterilizing filter into a common inlet to the replacement fluid portion; each of the plurality of connectors being connected to a respective one of multiple replacement fluid containers whose total content equals at least 8 liters of replacement fluid, each of the replacement fluid containers containing the same replacement fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A disposable fluid circuit for use in extracorporeal blood treatment systems that supply replacement fluid to a patient, comprising:
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a fluid circuit mounted in a cartridge; said fluid circuit including a blood circuit portion connected to a filter, a replacement fluid circuit portion connected to said blood circuit portion, and a waste circuit portion connected to said filter; the waste fluid circuit having multiple connectors joined to a common line that feeds replacement fluid to the blood circuit, the common line being a part of the replacement fluid portion; each of the multiple connectors being connected to a respective one of multiple replacement fluid containers, each of which contains sterile replacement fluid effective to restore a normal electrolyte balance of human blood; a sterilizing filter in said replacement fluid portion, said sterilizing filter having a pore size effective to eliminate pyrogens from a fluid passing therethrough; said sterilizing filter being located in an in-line configuration such that all replacement fluid passing into said blood circuit portion must pass through a membrane thereof. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A disposable fluid circuit for use in extracorporeal blood treatment systems that supply replacement fluid to a patient, comprising:
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a fluid circuit with a support; said fluid circuit including arterial and venous blood lines connectable to a patient access at access ends thereof and connectable to a filter at filter ends thereof; said fluid circuit including a replacement fluid line with an input end connectable to a replacement fluid supply and an output end connected to said venous blood line; said replacement fluid line having an inline sterile filter between said input and output ends configured such that all fluid passing from said input end to said output end passes through a membrane effective to block pyrogens; wherein said input end of said replacement fluid line has a branching connector with multiple ends for connection connected to multiple fluid sources of a same infusible replacement fluid. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A disposable fluid circuit for use in extracorporeal blood treatment systems that supply replacement fluid to a patient, comprising:
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a fluid circuit with a blood processing filter and a fluid input connector for receiving treatment fluid; a filtration set attached to the fluid input connector, the filtration set including a sterilizing filter connected to multiple connector leads that can be connected to respective fluid bags; there being no flow regulating portions between the connector leads and the sterilizing filter. - View Dependent Claims (22, 23, 24)
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Specification